Plotting two linear equations

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Sam Oznc
Sam Oznc 2018-3-16
评论： Star Strider 2018-3-17
Hi. How can i plot this equation between (-5,2) values
f(x) =
  • -1 ----> x<-1
  • x^2+x ------> -1 <= x < 2

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Star Strider
Star Strider 2018-3-16
Use ‘logical indexing’:
x = linspace(-5,2);
f = @(x) (-1).*(x < -1) + (x.^2 + x).*((x >= -1) & (x < 2));
figure(1)
plot(x, f(x))
grid

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